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# Veins have larger diameters, lumens, and thinner walls than do corresp

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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
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gooner wrote:
Do anyone have a good explanation for why the answer is and not ?

Hi,

C. Veins have larger diameters, larger lumens, and thinner walls than do corresponding arteries.
D. Veins have larger diameters, larger lumens, and thinner walls than corresponding arteries.

Comparison in D is inferior and ambiguous than comparison in C.

In D, we can read comparison also as if veins have lumens and arteries in itself, and we are comparing these two thing rather veins to arteries.
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
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In the given sentence the intended comparison is not between Vein and Artery, but "what Veins have" to "what arteries have".
So, option D is a NO. Because it is comparing wrong entities.
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
gooner wrote:
Veins have larger diameters, lumens, and thinner walls than do corresponding arteries.

A. Veins have larger diameters, lumens, and thinner walls than do corresponding arteries.
B. Veins have a larger diameter and lumen, as well as a thinner wall, than those of corresponding arteries.
C. Veins have larger diameters, larger lumens, and thinner walls than do corresponding arteries.
D. Veins have larger diameters, larger lumens, and thinner walls than corresponding arteries.
E. Compared to those of corresponding arteries, veins have a larger diameter, larger lumen, and thinner wall.

The question talks about the comparison between the qualities possessed by the veins and the qualities possessed by the arteries. Thus the right choice must compare the qualities of the two and not the qualities of Veins and the arteries. This would prove answer choice A, D and E wrong.

We are left with B and C now.

B talks of larger diameter and lumen... That means it is not a parallel comparison. When qualities, such as diameter, thinness, etc are under comparison, no nouns - lumen - should be compared. That deems choice B wrong.

A maintains the parallel structure and compares the qualities.

Hope that helps you...
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
Veins have larger diameters, lumens, and thinner walls than do corresponding arteries.

C. Veins have larger diameters, larger lumens, and thinner walls than do corresponding arteries.

I have a question and that is the reason why I eliminated this option.
do signifies an action right?

I like that girl than my brother does. -> Comparison is fine.
I have a better bat than my brother does -> I guess instead of does, it should be has.
I guess it should be "than corresponding arteries have". -> Perfect comparison.

Can somebody clarify.
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
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Hi, kinjiGC,

I am happy to respond…I appreciate your doubt, however, not very sure whether I would be able to help you the best, as my reasoning is drawn out of my observations. An expert would do well do endorse my reasoning…btw here are my thoughts…

To begin with, in your sentence:
I have a better bat than my brother does…CORRECT
I have a better bat than my brother has….(as is your ‘expected’ interpretation)…WRONG
In fact this sentence should be correctly modified to ‘I have a better bat than the onethat my brother has.’

Two reasons:

1. As a general rule, if the main verb is a transitive verb and is itself used to complete the clause following than in a comparison sentence involving an object-object comparison, it should be followed by its object. However, helping verbs can be used to substitute the main verb and end such a sentence without mentioning (though not always) the direct object of comparison in the clause following than.
2. ‘Have’ in this context is a transitive verb.

To illustrate these reasons, let us consider a few examples below.

SET1: (Note all verbs in sentences 1 to 5 are either intransitive or non-transitive)

1. Kate walks faster than Jim walks.
2. Humans live for a shorter span of time than turtles live.
3. Andy is taller than Bill is.
4. Apples are more healthy to eat than caramels are. (Taken from MGMAT SC guide, pg.130)
5. Today, Mr. Clarke has left for home earlier than he had left the day before
.
SET 2: (Note all verbs in sentences 6 to 10 are transitive)

6. Cezanne likes Andy more than she likes Bill.
7. His sister slaps him harder than his brother slaps him.
8. I have dreamt of going to Harvard more than I have dreamt of just starting up a new business venture.
9. I drive the car faster than my brother drives it.
10. (Finally, let’s take your sentence) I have a better bat than the one that my brother has.

Now ponder over the 2nd set (sentences 6 to 10) and let us re-write these sentences after omitting the object of the verb, after than

6. Cezanne likes Andy more than she likes. …(likes whom?)
7. His sister slaps him harder than his brother slaps …(slaps whom?)
8. I have dreamt of going to Harvard more than I have dreamt ….(dreamt of what?)
9. I drive the car faster than my brother drives …(drives what?)
10. I have a better bat than my brother has …(has what?)...(the way you wrote it)

Do you notice that these sentences (after omitting the object following than) sound incomplete? However, sentences 1 to 5 are fine the way they are. This substantiates my point no. 1 that if the sentence has a transitive verb, the object of which is undergoing comparison in some way, and if the same verb is used to complete the clause that follows than, THE VERB IN THIS CLAUSE SHOULD ALWAYS BE ACCOMPANIED BY ITS OBJECT. And this substantiates my point no. 2 that since, in your sentence, ‘have’ is used as a transitive verb, it should be followed by an object to complete the sentence or else it would be rendered incomplete (in the manner I have presented a corrected version, where ‘the one’ is the object of ‘has’ following than)

Now note, that ‘to have’ can also be used as a helping verb (classified as a non-transitive verb, since they are neither transitive nor intransitive) , as in sentence no. 5, where it is used as a helping verb. As such, in this sentence, the verb ‘has’ has no object and is correct the way it is written. Other examples of helping verbs are ‘to be’, ‘to do’, which can be used suitably to substitute main verbs as I has been demonstrated in the list (1 to 10) further.

Last, in any comparison sentence, the clause following than can employ the suitable helping verb instead of the main verb and thus eliminate redundancy in some cases associated with mentioning object after verb (in case of transitive) and thus make the sentence shorter and concise.

Re-writing sentences 1 to 10:

1. Kate walks faster than Jim does.
2. Humans live for a shorter span of time than turtles do.
3. Andy is taller than Bill (is).
4. Apples are more healthy to eat than caramels (are).
5. Today, Mr. Clarke has left for home earlier than he had (left) the day before.
6. Cezanne likes Andy more than she does Bill. (sounds awkward, but is correct, refer MGMAT SC 5th edition for an identical sentence on pg. 130)
7. His sister slaps him harder than his brother does.
8. I have dreamt of going to Harvard more than I have of just starting up a new business venture. (Here, probably the main transitive verb could be eliminated, but object (clause following than) is necessary to retain meaning)
9. I drive the car faster than my brother does.
10. I have a better bat than my brother does.

NOW FINALLY, going back to the original sentence,

C. Veins have larger diameters, larger lumens, and thinner walls than do corresponding arteries

Note, ‘have’ is used transitively, as a result of which the sentence if modified to

‘Veins have larger diameters, larger lumens, and thinner walls than corresponding arteries have’

would be incorrect. If you want to employ ‘have’ after than, rather correct it to

Veins have larger diameters, larger lumens, and thinner walls than those that corresponding arteries have.

‘Those’ following than is the object of the second ‘have’ and is correct the way it is written here.

Hence, option C stands tall and straight as a grammatically correct-worded sentence.

PS: I know this was a long rambling of sorts… but I hope this post helps in clarifying your doubt. Would love if an expert endorses this reasoning...

Originally posted by itzmyzone911 on 23 Sep 2014, 13:44.
Last edited by itzmyzone911 on 26 Sep 2014, 00:51, edited 8 times in total.
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
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kinjiGC wrote:
Veins have larger diameters, lumens, and thinner walls than do corresponding arteries.

C. Veins have larger diameters, larger lumens, and thinner walls than do corresponding arteries.

I have a question and that is the reason why I eliminated this option.
do signifies an action right?

I like that girl than my brother does. -> Comparison is fine.
I have a better bat than my brother does -> I guess instead of does, it should be has.
I guess it should be "than corresponding arteries have". -> Perfect comparison.

Can somebody clarify.

do/does/did act as action verbs and also as auxiliary verbs (for adding emphasis or to create negative sentences).

As Auxiliary verbs:

For example: I have your number.

I do have your number. (Emphasizing - probably in response to "Do you have my number?")
or
I don't have your number. (Negative sentence)

We don't need to repeat the action verb as long as we use the auxiliary verb while comparing. This is what happens in the correct sentence. The use of do is correct.
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
A. Veins have larger diameters, lumens, and thinner walls than do corresponding arteries.
C. Veins have larger diameters, larger lumens, and thinner walls than do corresponding arteries.

Why choice (A) is wrong ?

I narrowed down to (A) and (C). The only difference that i found between the two is "larger lumens", but i didn't understand the reason to eliminate (A). So, what's the reason to eliminate (A).
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
A D and E compare arteries and veins rather than the qualities possessed by the two, so they are out.

We are left with B and C.

B has a //ism problem. It includes a physical noun ‘lumen’ among its list of qualities. This is wrong.

So, C is the right answer.
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
there are two ways to compare two objects of the two clauses.

way 1.
we show the subject of the second clause . the second object dose not appear
I have a bigger book than you

way 2
we show explicitly the two nouns compared.
I have a bigger book than yours.
I have a bigger book that that on the table.

in this problem, by inserting 'those", writer want to explicitly show the two nouns compared. but "those' can not show clearly the second noun.
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
Pasharma1 wrote:
A D and E compare arteries and veins rather than the qualities possessed by the two, so they are out.

We are left with B and C.

B has a //ism problem. It includes a physical noun ‘lumen’ among its list of qualities. This is wrong.

So, C is the right answer.

Hey there,

I can understand how (D) and (E) compare veins and arteries rather than the qualities they possess. But, why do you think (A) compares veins and arteries when (C), the right choice, exactly does the same, except for the usage of large lumens in comparision.

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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
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Thoughtosphere wrote:
gooner wrote:
Veins have larger diameters, lumens, and thinner walls than do corresponding arteries.

A. Veins have larger diameters, lumens, and thinner walls than do corresponding arteries.
B. Veins have a larger diameter and lumen, as well as a thinner wall, than those of corresponding arteries.
C. Veins have larger diameters, larger lumens, and thinner walls than do corresponding arteries.
D. Veins have larger diameters, larger lumens, and thinner walls than corresponding arteries.
E. Compared to those of corresponding arteries, veins have a larger diameter, larger lumen, and thinner wall.

The question talks about the comparison between the qualities possessed by the veins and the qualities possessed by the arteries. Thus the right choice must compare the qualities of the two and not the qualities of Veins and the arteries. This would prove answer choice A, D and E wrong.

We are left with B and C now.

Hey there,

I can understand how (D) and (E) compare veins and arteries rather than the qualities they possess. But, why do you think (A) compares veins and arteries when (C), the right choice, exactly does the same, except for the usage of large lumens in comparision.

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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
Hi Experts,

I can understand how (D) and (E) compare veins and arteries rather than the qualities they possess. But, why is option (A) wrong when option (C), the right choice, exactly does the same, except for the usage of large lumens in comparision.

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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
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The problem with A is not the comparison; it's parallelism. C has a list of three differences between veins and arteries. A has two differences, with a simple noun in the middle messing up the list. We can say "larger X, Y, and Z" if all of X, Y, and Z are larger. In that case, the parallel terms are X, Y, and Z. We can also say "larger X, larger Y, and thinner Z." Now the parallel items are the comparative terms: larger X, larger Y, and thinner Z. However, we can't say "larger X, Y, and thinner Z." Now the parallel items can't be either of the sets we saw before. This won't work.
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Re: Veins have larger diameters, lumens, and thinner walls than do corresp [#permalink]
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